SFXGE_FLUSH_PENDING
rxq->flush_state = SFXGE_FLUSH_PENDING;
if (rxq->flush_state != SFXGE_FLUSH_PENDING)
if (rxq->flush_state == SFXGE_FLUSH_PENDING) {
txq->flush_state = SFXGE_FLUSH_PENDING;
if (txq->flush_state != SFXGE_FLUSH_PENDING)